Makefile:78: Warning: using /usr/src/linux as the source directory of your Linux kernel. If this is not correct, specify KERN_DIR=<directory> and run Make again.
Makefile:86: *** Error: /usr/src/linux (version 2.6.22.9-1mdvcustom) does not match the current kernel (version 2.6.22.18-server-1mdv).  Stop.